Alter/ˈɔːltər/ Definition 1 of 3Pro Tip 1/3Subtle Changes Use 'alter' to imply small but meaningful changes, rather than complete transformations. To improve your health, slightly alter your daily routine. Pro Tip 2/3Emotional Impact 'Alter' can indicate changes that affect emotions, signaling important adjustments. The news did not alter her cheerful mood. Pro Tip 3/3Plan Deviations Use 'alter' when plans or decisions are intentionally changed in response to new circumstances. We altered our travel plans due to the storm.